Question

Cómo resolver {3x-4y=13 2x+3y=3

Answer 1

x-4y=13  

multiplying by 3 9x-12y=39....................(1)  

2x+3y=3  

multiplying by 4 8x+12y=12....................(2)  

adding 1 and 2  

17x=51  

so x=51/17 =>3  

substituting in 3x-4y=13 and solving -4y=4 and so y=-1

Answer 2

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